A series of statistical descriptions of the individuals committed to Massachusetts DOC facilities by the courts during 1999 is presented in this report through the detailing of demographic characteristics of the DOC 1999 commitment population. A series of figures and tables describes the inmates according to race, ethnicity, marital status, religion, and age at the time of incarceration. Focusing on the current offenses of committed individuals, this report describes a series of categories of offenses, including offenses against persons and property, sex, drug, and other offenses. After addressing person, sex, property, drug, and other offenses by gender, this report details sentencing for the year 1999. Tables indicating minimum and maximum sentencing and the court from which an individual was committed, by gender, are also presented. Addressing various DOC trends from 1990 to 1999, a series of tables is presented that include commitments by gender, race, ethnicity, age at the time of incarceration, current offense categories, and minimum, maximum, and life sentencing. A glossary of terms used throughout this report is followed by an appendix detailing various types of offenses by category.